Abstract:
PROBLEM TO BE SOLVED: To provide an MOS technology power device having integrated circuit in which the series resistance of gate can be decreased without increasing the number of gate metal finger parts. SOLUTION: The MOS technology power device of integrated structure comprises a plurality of functional units of basic component formed in a lightly doped first conductivity type semiconductor layer 1 wherein the functional unit has a second conductivity type channel region 6 coated with a conductive insulation gate layer 8 including a polysilicon layer 5. The conductive insulation gate layer 8 has resistivity significantly lower than that of the polysilicon layer 5 superposed by a highly conductive layer 9. Since a resistance introduced by the polysilicon layer 5 is shunted by a resistance introduced by the highly conductive layer 9, total resistivity of the conductive insulation gate layer 8 is decreased.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of an integrated edge structure for a high voltage semiconductor device. SOLUTION: A first conductivity-type (n-type) first semiconductor layer 41 is formed, and a first mask is formed on the upper face. A part of the mask is removed, and at least one opening is formed in the mask. Second conductivity- type impurities are introduced into the first semiconductor layer 41 through an opening, the first mask is completely removed and an N-type second semiconductor layer 42 is formed on the first semiconductor layer. The impurities implanted into the first semiconductor layer are diffused, and a P-type doped region 220 is formed in the first and second semiconductor layers. Final edge structure provided with plural N-type overlap semiconductor layers 41-46, and two inserted columns in plural overlap semiconductor layers formed of the overlap of plural P-type doped regions 220-260 implanted from the opening is formed by repeating six processes once or more. The column near the high- voltage semiconductor device is deeper than the column far from the device.
Abstract:
PURPOSE: To reduce the manufacturing process of the channel region of a basic function unit and to reduce the ON resistance of a power device by forming the deep body part and the channel part of a body region only by ion implantation without performing any thermal diffusion treatment. CONSTITUTION: After a first dopant is selectively ion-implanted into a heavily doped part 5 in a direction that orthogonally crosses a semiconductor surface with a proper amount of dosage and an energy of ion implantation with an insulation gate layer 8 as a mask, a second dopant is selectively ion-implanted into a region 6 along a direction that is inclined at a prescribed angle in an orthogonally crossed direction, thus forming a body region 2. Then, a large dosage of third dopant is ion-implanted into the greatly doped part 5 to form a source region 7 that is nearly aligned to the edge part of the insulation gate layer 8, thus reducing the manufacturing process of the channel region of a basic function unit since no thermal diffusion treatment is made and reducing the on resistance of a power device.
Abstract:
The invention relates to a semiconductor device for electro-optic applications of the type including at least a rare-earth ions doped P/N junction integrated on a semiconductor substrate. This device may be used to obtain laser action in Silicon and comprises a cavity or a waveguide and a coherent light source obtained incorporating the rare-earth ions, and specifically Erbium ions, in the depletion layer of said P/N junction. The junction may be for instance the base-collector region of a bipolar transistor and is reverse biased.
Abstract:
Power electronic device (30) integrated on a semiconductor substrate (100) of a first type of conductivity comprising a plurality of elemental units, each elemental unit comprising: a body region (40) of a second type of conductivity realised on a semiconductor layer (20) of the first type of conductivity formed on the semiconductor substrate (100), a column region (50) of the first type of conductivity realised in said semiconductor layer (20) below the body region (40), wherein the semiconductor layer (20) comprises a plurality of semiconductor layers (21, 22, 23, 24), overlapped on each other, wherein the resistivity of each layer is different from that of the other layers and in that said column region (50) comprises a plurality of doped sub-regions (51, 52, 53, 54), each realised in one of said semiconductor layers (21, 22, 23, 24), wherein the amount of charge of each doped sub-regions (51, 52, 53, 54) balances the amount of charge of the semiconductor layer (21, 22, 23, 24) wherein each doped sub-region (51, 52, 53, 54) is realised.
Abstract:
Method for manufacturing electronic devices on a semiconductor substrate (1, 1a; 10, 11) with wide band gap comprising the steps of: forming a screening structure (3a, 20) on said semiconductor substrate (1, 1a; 10, 11) comprising at least a dielectric layer (2, 20) which leaves a plurality of areas of said semiconductor substrate (1, 1a; 10, 11) exposed, carrying out at least a ion implantation of a first type of dopant in said semiconductor substrate (1, 1a; 10, 11) to form at least a first implanted region (4, 40), carrying out at least a ion implantation of a second type of dopant in said semiconductor substrate (1, 1a; 10, 11) to form at least a second implanted region (6, 6c; 60, 61) inside said at least a first implanted region (4, 40), carrying out an activation thermal process of the first type and second type of dopant with low thermal budget suitable to complete said formation of said at least first and second implanted regions (4, 40; 6, 60).